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What is the value of b^2-4ac for the following equation 2x^2-2x-1=0
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What is the value of b^2-4ac for the following equation 2x^2-2x-1=0

User Wenlong
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Here a = 2, b = -2, c = -1
b^2-4ac = (-2)^2 - 4(2)(-1)
= 4 +8
= 12
User Hero Wanders
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